Sanding machine



v. AVOLIO AND F. LATTANZI.

SANDING MACHINE.

APPLICATION FIL-ED APILZT. 1921.

V. AVOLIO AND F. LATTANZI.

SANDING MACHINE. APPLICATION FILED APR. 27| i921.

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V. AVOLIO AND F. LATTANZI. SANDING MACHINE. APPLICATION FILED APR. 27 1921. 1,417,293. Patented May23,1922.

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SANDNG IVIACI-INE.

Application filed April 27, 1921.

To all fao/0m it may concern.'

Be it hereby known that we, Vincenzo AvoLio and FERDINANDO LATTANZI, respectively a subject of the lling of Italy, (who has declared his intention ot becoming a citizen or' the United States and a citizen ot' the United States, residents otl Portland, in the county or Multnomah and State oi Oregon, have invented' a new and usefull Sanding Machine, of which the following is a specification. l

This invention relates more particularly to machines for sanding edges of table tops with sand paper belts.

The .objects oi our invention are to provide an exceedingly simple and eliicient machine to be used. in connection with abelt sander which will render it possible to eliminate a great deal oi work that is now performed manually.

lVe accomplish these results in the manner set `iorth in the following specification and illustrated in the accompanying drawing, in which:

Figure l is a front elevation of our machine set up for one class oit work. Figure 2 is a side elevationof Fig. l. Figure illustrates the manner in which the machine finishes moulded edges. plan showing the construction of the frame ot the machine. Figure 5 is afi-ont elevation showing the machine handling a different class noi work. Figure 6 is side elevation of Fig. 5. Figure 'T shows an attachment of the machine for finishing the aprons of table tops. Figure S is a plan of Fig. 7.

Figure 9 is a vertical section along the line 9 9 in Figure 10.

Figure l() is a horizontal section along the linel lO-lO in Figure 9.

Similar numbers of reference refer to the same or similar parts throughout the several Views.

Referring in detail to the drawing, we have constructed our machine as shown in the drawings in which the device is mounted over a pit l0 on a pair of tracks il which are mounted underneath at right angles to a sand belt l2 passing over the pulleys i3, such as are in common use.

A rectangular trame 14 is supported by the rollers 15 on the tracks il and rendered rigid by the interior braces i6, see Figure e. Near the forward side of the trame le we have hinged a table member i? formed of Specification of Letters Patent.

Figure el is a partial Patented llllay 23, 1922.

Serial No. 464,865.

boards secured to the members 18 which are joined by bolts 19 to the frame ll. The braces 20 hold the table il' in any desired relation to the iframe le by means of the bolts 2l and 22 which are placed in the corresponding holes n Onthe Afront side of the 4table il we `have placed aturn-table 24; provided with suitable spherical rollers 25 and pivoted on a bolt 26 which passes through any one or' the holes27 in the table l and the reiniorcing member 28. The various holes 2T are used for the various sizes of work enl countered in bringing them within rangel oi' the sand belt l2. Suspended from the table il' are the two hangers 29 on whose lower ends are attached the grooved rollers 230. The hangers 29 are also susceptible to vertical adjustment. l

Across the projecting ends 3l ol' the braces 2() we have placed a round bar hinged at the pivot 253 and hooked upon the shouldered pin. Eil. This bar 32 is utili-Zed in moving the machine along its track .l'l and also to support the roller 35 by means of the rod 35.

rlhe form of the machine just described is used in sanding the edges ot a completed circular table top 37 which is held against the turntable 2d by means ot the roller 235 and supported by means of the rollers 30. lt will be evident that it is now asimph` matter to bring the sand belt l2 down by means ot the block 12B to the edge ot the table top 37. and by rotating the top its entire circumference may be finely sanded in a very short space of time.

This same machine is used to sand the aprons by substituting the frame 38 shown in Fig. 7 which is mounted on the cross spokes 39 in place of the table top 37. The apron i() to be sanded is inserted under a lip 4-1 on the trame 38 and is then pressed securely against the points ft2 projecting from the frame 38. The method ot' sanding' the surface of this apron l0 is exactly the same as described for the edge ot the table top 37. A hand rail 43 is attached to the trame 38 to facilitate its rotation.

Turning now to Figures l and 2 we have illustrated the same device, but have left oil' the rollers 30 and have attached instead a semi-circular board le oi av somewhat smaller diameter than are the half round table tops to be sanded in the following operation. These tops have a grooved edge which has hitherto been sand papered by hand with the` expenditure of a great amount of labor. In this case we also employ the sand belt 12A, which is suliiciently narrow to enter the groove 45. It is evident that a partial rotation ot the part table top I6 containing the groove l5 Will easily expose the groove to the action or the sand belt 12A. It Will be understood that the bolt 26 of the turntable 24 must be placed in the proper hole 2T in order to provide a working radius equal to that or' the Work 46.

l/Vhen it is desired to nish amoulded edge 47 similar to the one shown in Fig. 3 it is def sirable to tip 'the table il' toward the angle shown in dotted lines as 18A, which is accomplished as previously explained by the changing of the bolts 2l and 22. A narrow sand belt 12A is also used in this operation which permits the bringing or the belt up close to the shoulder LIS by means or the block 49, which is shaped to lit the moulded edge 47.

It will be understood that in sand papering the moulded ends oit table leaves instead of the rounded ends previously referred to it will be necessary to prevent the table 17 from rotating. This may be accomplished by removing the table altogether or by the insertion oi clannging bolts 5t). in inost cases, however, the provision oiI dowels 51 on the edge oi'." the member std, or its equivalent, will be su'liicient to hold the Work against the table. Otherwise the 'usual .f means for holding work `in place may be employed as desired.

lt will be understood that the turn table 2i is rotated by hand at the will oli the operator, and by ineansoi' this turn table the articles which are clamped or held against saine may be exposed lo the action olf the sand belt. 'lhe rollersI 25 are used merely to reduce the friction between the turn table 24- and the table 17. rlhe rollers 30 are made adjustable in order that the work may be properly centered upon the table 24.

The trame 38 is placed centrally upon the turn table 24 and clamped to same with bolts through the holes 27. This of course is only used for sanding the-aprons 40.

TWhile We have thus illustrated and described our invention it is not our desire to limit ourselves to this precise form or method of application, but We intend that it shall cover all forms and modifications that :tall .fairly Within the appended claims.

What We claim as nevi7 is:

l. In a sanding machine, the combination ot a sanding belt with a track under and at right angles to said belt, a carriage on said track, a tiltable turn-table mounted on said carriage, a pair ol adjustable rolls on said carriage adapted to support a circular object concentrically With and alongside of said turntable, and a clamping means for holding said circular object against the turntable. i

2. The combination of a sanding belt with a track under same, a vpit under said track, a carriage on said track, a tiltable table hinged at one side to said carriage and secured .in any position by angular braces adjust-ably attached to said carriage and table, a turntable rotatable by hand mounted against said table, roller means adjustably attached to said tiltable table'and projecting in front ot said turntable, and a clamp means consisting ot an arm adapted to bear against the under side of a table top atits center and hold same against the turntable in a manner that .the turntable and the table top may he rotated together by hand.

In a sanding machine, the combination y ot a sanding belt, a track under said belt, a carriage on said track, a tiltable turntable on said carriage, a stop on said turntable adapted to hold seinicireular boards concentrically against said turntable in a manner that said belt may be brought down against the edge of said board.

VINCENZO AVOLIO. FERDINANDO LATTANZI. 

